| Agglomeration and no large-scale preparation of nanomaterials are the two major problems in the field of materials science at present. In this thesis, biomedicine and energetic materials of AMT·HCl, FOX-7and CL-20, based on the most development prospect and application value of organic materials were successfully prepared via a novel ultrasonic spray-assisted electrostatic adsorption (USEA) method, and a deep analysis about thermal properties of nano-sized materials was disscussed. The main research contents are as follows:1. Different organic nano materials were obtained via USEA method, the samples were characterized by Field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Atomic force microscope (AFM) and Particle size and size distribution and Dynamic light scattering (DLS). The factors which may affect the crystal size:solution concentration, ultrasonic frequency, temperature gradient and the electrostatic voltage etc. were also summarized for optimizing the experimental conditions.2. Thermal properties were further investigated by Differential scanning calorimetry (DSC) and Thermogravimetry (TG). The result shows that organic particles with nanometer exhibit extremely thermal performance compare to original and sub-micro particles. The influencing factors resulting in differenct thermal performance were deeply discussed according to materials’natural properties.The USEA method offers simple preparation process, easy operation and free control of condition. Besides biological medicines and energetic materials, this method can also be used for preparing other nano-sized crystals on a large-scale, and the prepared nano-sized crystals exhibit no obvious agglomeration. The approach effectively solves the two problems which exist in the field of nanoscience. |
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